mirror of
https://github.com/bitwarden/browser
synced 2025-12-06 00:13:28 +00:00
[PM-26340] Implement encrypted memory store (#16659)
* Extract windows biometrics v2 changes Co-authored-by: Bernd Schoolmann <mail@quexten.com> * Address some code review feedback * cargo fmt * rely on zeroizing allocator * Handle TDE edge cases * Update windows default * Make windows rust code async and fix restoring focus freezes * fix formatting * cleanup native logging * Add unit test coverage * Add missing logic to edge case for PIN disable. * Address code review feedback * fix test * code review changes * fix clippy warning * Swap to unimplemented on each method * Implement encrypted memory store * Make dpapi secure key container pub(super) * Add comments on sync and send * Clean up comments * Clean up * Fix build * Add logging and update codeowners * Run cargo fmt * Clean up doc * fix unit tests * Update apps/desktop/desktop_native/core/src/secure_memory/secure_key/mod.rs Co-authored-by: Thomas Avery <43214426+Thomas-Avery@users.noreply.github.com> * Handle tampering with re-key and log * Add docs * Fix windows build * Prevent rust flycheck log from being commited to git * Undo feature flag change * Add env var override and docs * Add deps to km owership --------- Co-authored-by: Thomas Avery <tavery@bitwarden.com> Co-authored-by: Thomas Avery <43214426+Thomas-Avery@users.noreply.github.com>
This commit is contained in:
Bernd Schoolmann
GitHub
1
.github/CODEOWNERS
vendored
1
.github/CODEOWNERS
vendored
@@ -8,6 +8,7 @@
|
||||
apps/desktop/desktop_native @bitwarden/team-platform-dev
|
||||
apps/desktop/desktop_native/objc/src/native/autofill @bitwarden/team-autofill-desktop-dev
|
||||
apps/desktop/desktop_native/core/src/autofill @bitwarden/team-autofill-desktop-dev
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||||
apps/desktop/desktop_native/core/src/secure_memory @bitwarden/team-key-management-dev
|
||||
## No ownership for Cargo.lock and Cargo.toml to allow dependency updates
|
||||
apps/desktop/desktop_native/Cargo.lock
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||||
apps/desktop/desktop_native/Cargo.toml
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11
.github/renovate.json5
vendored
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.github/renovate.json5
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@@ -400,7 +400,16 @@
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reviewers: ["team:team-vault-dev"],
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},
|
||||
{
|
||||
matchPackageNames: ["aes", "big-integer", "cbc", "rsa", "russh-cryptovec", "sha2"],
|
||||
matchPackageNames: [
|
||||
"aes",
|
||||
"big-integer",
|
||||
"cbc",
|
||||
"rsa",
|
||||
"russh-cryptovec",
|
||||
"sha2",
|
||||
"memsec",
|
||||
"linux-keyutils",
|
||||
],
|
||||
description: "Key Management owned dependencies",
|
||||
commitMessagePrefix: "[deps] KM:",
|
||||
reviewers: ["team:team-key-management-dev"],
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||||
|
||||
1
.gitignore
vendored
1
.gitignore
vendored
@@ -28,6 +28,7 @@ npm-debug.log
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# Build directories
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dist
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build
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target
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.angular/cache
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.flatpak
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.flatpak-repo
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||||
93
apps/desktop/desktop_native/Cargo.lock
generated
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apps/desktop/desktop_native/Cargo.lock
generated
@@ -927,6 +927,8 @@ dependencies = [
|
||||
"interprocess",
|
||||
"keytar",
|
||||
"libc",
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||||
"linux-keyutils",
|
||||
"memsec",
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||||
"oo7",
|
||||
"pin-project",
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||||
"pkcs8",
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||||
@@ -1793,6 +1795,16 @@ dependencies = [
|
||||
"cc",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "linux-keyutils"
|
||||
version = "0.2.4"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
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||||
checksum = "761e49ec5fd8a5a463f9b84e877c373d888935b71c6be78f3767fe2ae6bed18e"
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||||
dependencies = [
|
||||
"bitflags",
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||||
"libc",
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||||
]
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[[package]]
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||||
name = "linux-raw-sys"
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version = "0.4.15"
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@@ -1878,6 +1890,17 @@ dependencies = [
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"autocfg",
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]
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[[package]]
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name = "memsec"
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version = "0.7.0"
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||||
source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "c797b9d6bb23aab2fc369c65f871be49214f5c759af65bde26ffaaa2b646b492"
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dependencies = [
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"getrandom 0.2.16",
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"libc",
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"windows-sys 0.45.0",
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]
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[[package]]
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name = "mime"
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version = "0.3.17"
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@@ -3993,6 +4016,15 @@ dependencies = [
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"windows-link",
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||||
]
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[[package]]
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name = "windows-sys"
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version = "0.45.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "75283be5efb2831d37ea142365f009c02ec203cd29a3ebecbc093d52315b66d0"
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dependencies = [
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"windows-targets 0.42.2",
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]
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[[package]]
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name = "windows-sys"
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version = "0.52.0"
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@@ -4020,6 +4052,21 @@ dependencies = [
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"windows-targets 0.53.3",
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||||
]
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||||
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||||
[[package]]
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name = "windows-targets"
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version = "0.42.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "8e5180c00cd44c9b1c88adb3693291f1cd93605ded80c250a75d472756b4d071"
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dependencies = [
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"windows_aarch64_gnullvm 0.42.2",
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"windows_aarch64_msvc 0.42.2",
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||||
"windows_i686_gnu 0.42.2",
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||||
"windows_i686_msvc 0.42.2",
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||||
"windows_x86_64_gnu 0.42.2",
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"windows_x86_64_gnullvm 0.42.2",
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"windows_x86_64_msvc 0.42.2",
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]
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[[package]]
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name = "windows-targets"
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version = "0.48.5"
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@@ -4068,6 +4115,12 @@ dependencies = [
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"windows_x86_64_msvc 0.53.0",
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]
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[[package]]
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name = "windows_aarch64_gnullvm"
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version = "0.42.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "597a5118570b68bc08d8d59125332c54f1ba9d9adeedeef5b99b02ba2b0698f8"
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[[package]]
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||||
name = "windows_aarch64_gnullvm"
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version = "0.48.5"
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@@ -4086,6 +4139,12 @@ version = "0.53.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "86b8d5f90ddd19cb4a147a5fa63ca848db3df085e25fee3cc10b39b6eebae764"
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[[package]]
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||||
name = "windows_aarch64_msvc"
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version = "0.42.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "e08e8864a60f06ef0d0ff4ba04124db8b0fb3be5776a5cd47641e942e58c4d43"
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[[package]]
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name = "windows_aarch64_msvc"
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version = "0.48.5"
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@@ -4104,6 +4163,12 @@ version = "0.53.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "c7651a1f62a11b8cbd5e0d42526e55f2c99886c77e007179efff86c2b137e66c"
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||||
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||||
[[package]]
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||||
name = "windows_i686_gnu"
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||||
version = "0.42.2"
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||||
source = "registry+https://github.com/rust-lang/crates.io-index"
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||||
checksum = "c61d927d8da41da96a81f029489353e68739737d3beca43145c8afec9a31a84f"
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[[package]]
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||||
name = "windows_i686_gnu"
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||||
version = "0.48.5"
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||||
@@ -4134,6 +4199,12 @@ version = "0.53.0"
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||||
source = "registry+https://github.com/rust-lang/crates.io-index"
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||||
checksum = "9ce6ccbdedbf6d6354471319e781c0dfef054c81fbc7cf83f338a4296c0cae11"
|
||||
|
||||
[[package]]
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||||
name = "windows_i686_msvc"
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||||
version = "0.42.2"
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||||
source = "registry+https://github.com/rust-lang/crates.io-index"
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||||
checksum = "44d840b6ec649f480a41c8d80f9c65108b92d89345dd94027bfe06ac444d1060"
|
||||
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||||
[[package]]
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||||
name = "windows_i686_msvc"
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||||
version = "0.48.5"
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||||
@@ -4161,6 +4232,12 @@ dependencies = [
|
||||
"windows-core 0.61.0",
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||||
]
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||||
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||||
[[package]]
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||||
name = "windows_x86_64_gnu"
|
||||
version = "0.42.2"
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||||
source = "registry+https://github.com/rust-lang/crates.io-index"
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||||
checksum = "8de912b8b8feb55c064867cf047dda097f92d51efad5b491dfb98f6bbb70cb36"
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||||
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||||
[[package]]
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||||
name = "windows_x86_64_gnu"
|
||||
version = "0.48.5"
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||||
@@ -4179,6 +4256,12 @@ version = "0.53.0"
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||||
source = "registry+https://github.com/rust-lang/crates.io-index"
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||||
checksum = "2e55b5ac9ea33f2fc1716d1742db15574fd6fc8dadc51caab1c16a3d3b4190ba"
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||||
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||||
[[package]]
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||||
name = "windows_x86_64_gnullvm"
|
||||
version = "0.42.2"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
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||||
checksum = "26d41b46a36d453748aedef1486d5c7a85db22e56aff34643984ea85514e94a3"
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[[package]]
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name = "windows_x86_64_gnullvm"
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version = "0.48.5"
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@@ -4197,6 +4280,12 @@ version = "0.53.0"
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||||
source = "registry+https://github.com/rust-lang/crates.io-index"
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||||
checksum = "0a6e035dd0599267ce1ee132e51c27dd29437f63325753051e71dd9e42406c57"
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[[package]]
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||||
name = "windows_x86_64_msvc"
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version = "0.42.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9aec5da331524158c6d1a4ac0ab1541149c0b9505fde06423b02f5ef0106b9f0"
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[[package]]
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name = "windows_x86_64_msvc"
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version = "0.48.5"
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@@ -4416,9 +4505,9 @@ dependencies = [
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[[package]]
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name = "zeroize"
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version = "1.8.1"
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||||
version = "1.8.2"
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||||
source = "registry+https://github.com/rust-lang/crates.io-index"
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||||
checksum = "ced3678a2879b30306d323f4542626697a464a97c0a07c9aebf7ebca65cd4dde"
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checksum = "b97154e67e32c85465826e8bcc1c59429aaaf107c1e4a9e53c8d8ccd5eff88d0"
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dependencies = [
|
||||
"zeroize_derive",
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]
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@@ -39,7 +39,9 @@ homedir = "=0.3.4"
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interprocess = "=2.2.1"
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keytar = "=0.1.6"
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libc = "=0.2.172"
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linux-keyutils = "=0.2.4"
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log = "=0.4.25"
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memsec = "=0.7.0"
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napi = "=2.16.17"
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napi-build = "=2.2.0"
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napi-derive = "=2.16.13"
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@@ -32,6 +32,7 @@ ed25519 = { workspace = true, features = ["pkcs8"] }
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futures = { workspace = true }
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homedir = { workspace = true }
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interprocess = { workspace = true, features = ["tokio"] }
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memsec = { workspace = true, features = ["alloc_ext"] }
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pin-project = { workspace = true }
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pkcs8 = { workspace = true, features = ["alloc", "encryption", "pem"] }
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rand = { workspace = true }
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@@ -87,6 +88,7 @@ desktop_objc = { path = "../objc" }
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[target.'cfg(target_os = "linux")'.dependencies]
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oo7 = { workspace = true }
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libc = { workspace = true }
|
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linux-keyutils = { workspace = true }
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ashpd = { workspace = true }
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zbus = { workspace = true, optional = true }
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@@ -54,7 +54,7 @@ impl SecureMemoryStore for DpapiSecretKVStore {
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self.map.insert(key, padded_data);
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}
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fn get(&self, key: &str) -> Option<Vec<u8>> {
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fn get(&mut self, key: &str) -> Option<Vec<u8>> {
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self.map.get(key).map(|data| {
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// A copy is created, that is then mutated by the DPAPI unprotect function.
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let mut data = data.clone();
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@@ -0,0 +1,105 @@
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use tracing::error;
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use crate::secure_memory::{
|
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secure_key::{EncryptedMemory, SecureMemoryEncryptionKey},
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SecureMemoryStore,
|
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};
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/// An encrypted memory store holds a platform protected symmetric encryption key, and uses it
|
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/// to encrypt all items it stores. The ciphertexts for the items are not specially protected. This
|
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/// allows circumventing length and amount limitations on platform specific secure memory APIs since
|
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/// only a single short item needs to be protected.
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///
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/// The key is briefly in process memory during encryption and decryption, in memory that is protected
|
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/// from swapping to disk via mlock, and then zeroed out immediately after use.
|
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#[allow(unused)]
|
||||
pub(crate) struct EncryptedMemoryStore {
|
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map: std::collections::HashMap<String, EncryptedMemory>,
|
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memory_encryption_key: SecureMemoryEncryptionKey,
|
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}
|
||||
|
||||
impl EncryptedMemoryStore {
|
||||
#[allow(unused)]
|
||||
pub(crate) fn new() -> Self {
|
||||
EncryptedMemoryStore {
|
||||
map: std::collections::HashMap::new(),
|
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memory_encryption_key: SecureMemoryEncryptionKey::new(),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl SecureMemoryStore for EncryptedMemoryStore {
|
||||
fn put(&mut self, key: String, value: &[u8]) {
|
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let encrypted_value = self.memory_encryption_key.encrypt(value);
|
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self.map.insert(key, encrypted_value);
|
||||
}
|
||||
|
||||
fn get(&mut self, key: &str) -> Option<Vec<u8>> {
|
||||
let encrypted_memory = self.map.get(key);
|
||||
if let Some(encrypted_memory) = encrypted_memory {
|
||||
match self.memory_encryption_key.decrypt(encrypted_memory) {
|
||||
Ok(plaintext) => Some(plaintext),
|
||||
Err(_) => {
|
||||
error!("In memory store, decryption failed for key {}. The memory may have been tampered with. re-keying.", key);
|
||||
self.memory_encryption_key = SecureMemoryEncryptionKey::new();
|
||||
self.clear();
|
||||
None
|
||||
}
|
||||
}
|
||||
} else {
|
||||
None
|
||||
}
|
||||
}
|
||||
|
||||
fn has(&self, key: &str) -> bool {
|
||||
self.map.contains_key(key)
|
||||
}
|
||||
|
||||
fn remove(&mut self, key: &str) {
|
||||
self.map.remove(key);
|
||||
}
|
||||
|
||||
fn clear(&mut self) {
|
||||
self.map.clear();
|
||||
}
|
||||
}
|
||||
|
||||
impl Drop for EncryptedMemoryStore {
|
||||
fn drop(&mut self) {
|
||||
self.clear();
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
|
||||
#[test]
|
||||
fn test_secret_kv_store_various_sizes() {
|
||||
let mut store = EncryptedMemoryStore::new();
|
||||
for size in 0..=2048 {
|
||||
let key = format!("test_key_{}", size);
|
||||
let value: Vec<u8> = (0..size).map(|i| (i % 256) as u8).collect();
|
||||
store.put(key.clone(), &value);
|
||||
assert!(store.has(&key), "Store should have key for size {}", size);
|
||||
assert_eq!(
|
||||
store.get(&key),
|
||||
Some(value),
|
||||
"Value mismatch for size {}",
|
||||
size
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_crud() {
|
||||
let mut store = EncryptedMemoryStore::new();
|
||||
let key = "test_key".to_string();
|
||||
let value = vec![1, 2, 3, 4, 5];
|
||||
store.put(key.clone(), &value);
|
||||
assert!(store.has(&key));
|
||||
assert_eq!(store.get(&key), Some(value));
|
||||
store.remove(&key);
|
||||
assert!(!store.has(&key));
|
||||
}
|
||||
}
|
||||
@@ -1,6 +1,9 @@
|
||||
#[cfg(target_os = "windows")]
|
||||
pub(crate) mod dpapi;
|
||||
|
||||
mod encrypted_memory_store;
|
||||
mod secure_key;
|
||||
|
||||
/// The secure memory store provides an ephemeral key-value store for sensitive data.
|
||||
/// Data stored in this store is prevented from being swapped to disk and zeroed out. Additionally,
|
||||
/// platform-specific protections are applied to prevent memory dumps or debugger access from
|
||||
@@ -12,7 +15,9 @@ pub(crate) trait SecureMemoryStore {
|
||||
/// Retrieves a copy of the value associated with the given key from secure memory.
|
||||
/// This copy does not have additional memory protections applied, and should be zeroed when no
|
||||
/// longer needed.
|
||||
fn get(&self, key: &str) -> Option<Vec<u8>>;
|
||||
///
|
||||
/// Note: If memory was tampered with, this will re-key the store and return None.
|
||||
fn get(&mut self, key: &str) -> Option<Vec<u8>>;
|
||||
/// Checks if a value is stored under the given key.
|
||||
fn has(&self, key: &str) -> bool;
|
||||
/// Removes the value associated with the given key from secure memory.
|
||||
|
||||
@@ -0,0 +1,96 @@
|
||||
use std::ptr::NonNull;
|
||||
|
||||
use chacha20poly1305::{aead::Aead, Key, KeyInit};
|
||||
use rand::{rng, Rng};
|
||||
|
||||
pub(super) const KEY_SIZE: usize = 32;
|
||||
pub(super) const NONCE_SIZE: usize = 24;
|
||||
|
||||
/// The encryption performed here is xchacha-poly1305. Any tampering with the key or the ciphertexts will result
|
||||
/// in a decryption failure and panic. The key's memory contents are protected from being swapped to disk
|
||||
/// via mlock.
|
||||
pub(super) struct MemoryEncryptionKey(NonNull<[u8]>);
|
||||
|
||||
/// An encrypted memory blob that must be decrypted using the same key that it was encrypted with.
|
||||
pub struct EncryptedMemory {
|
||||
nonce: [u8; NONCE_SIZE],
|
||||
ciphertext: Vec<u8>,
|
||||
}
|
||||
|
||||
impl MemoryEncryptionKey {
|
||||
pub fn new() -> Self {
|
||||
let mut key = [0u8; KEY_SIZE];
|
||||
rng().fill(&mut key);
|
||||
MemoryEncryptionKey::from(&key)
|
||||
}
|
||||
|
||||
/// Encrypts the given plaintext using the key.
|
||||
#[allow(unused)]
|
||||
pub(super) fn encrypt(&self, plaintext: &[u8]) -> EncryptedMemory {
|
||||
let cipher = chacha20poly1305::XChaCha20Poly1305::new(Key::from_slice(self.as_ref()));
|
||||
let mut nonce = [0u8; NONCE_SIZE];
|
||||
rng().fill(&mut nonce);
|
||||
let ciphertext = cipher
|
||||
.encrypt(chacha20poly1305::XNonce::from_slice(&nonce), plaintext)
|
||||
.expect("encryption should not fail");
|
||||
EncryptedMemory { nonce, ciphertext }
|
||||
}
|
||||
|
||||
/// Decrypts the given encrypted memory using the key. A decryption failure will panic. This is
|
||||
/// okay because neither the keys nor ciphertexts should ever fail to decrypt, and doing so
|
||||
/// indicates that the process memory was tampered with.
|
||||
#[allow(unused)]
|
||||
pub(super) fn decrypt(&self, encrypted: &EncryptedMemory) -> Result<Vec<u8>, DecryptionError> {
|
||||
let cipher = chacha20poly1305::XChaCha20Poly1305::new(Key::from_slice(self.as_ref()));
|
||||
cipher
|
||||
.decrypt(
|
||||
chacha20poly1305::XNonce::from_slice(&encrypted.nonce),
|
||||
encrypted.ciphertext.as_ref(),
|
||||
)
|
||||
.map_err(|_| DecryptionError::CouldNotDecrypt)
|
||||
}
|
||||
}
|
||||
|
||||
impl Drop for MemoryEncryptionKey {
|
||||
fn drop(&mut self) {
|
||||
unsafe {
|
||||
memsec::free(self.0);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl From<&[u8; KEY_SIZE]> for MemoryEncryptionKey {
|
||||
fn from(value: &[u8; KEY_SIZE]) -> Self {
|
||||
let mut ptr: NonNull<[u8]> =
|
||||
unsafe { memsec::malloc_sized(KEY_SIZE).expect("malloc_sized should work") };
|
||||
unsafe {
|
||||
std::ptr::copy_nonoverlapping(value.as_ptr(), ptr.as_mut().as_mut_ptr(), KEY_SIZE);
|
||||
}
|
||||
MemoryEncryptionKey(ptr)
|
||||
}
|
||||
}
|
||||
|
||||
impl AsRef<[u8]> for MemoryEncryptionKey {
|
||||
fn as_ref(&self) -> &[u8] {
|
||||
unsafe { self.0.as_ref() }
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Debug)]
|
||||
pub(crate) enum DecryptionError {
|
||||
CouldNotDecrypt,
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
|
||||
#[test]
|
||||
fn test_memory_encryption_key() {
|
||||
let key = MemoryEncryptionKey::new();
|
||||
let data = b"Hello, world!";
|
||||
let encrypted = key.encrypt(data);
|
||||
let decrypted = key.decrypt(&encrypted).unwrap();
|
||||
assert_eq!(data.as_ref(), decrypted.as_slice());
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,93 @@
|
||||
use super::crypto::{MemoryEncryptionKey, KEY_SIZE};
|
||||
use super::SecureKeyContainer;
|
||||
use windows::Win32::Security::Cryptography::{
|
||||
CryptProtectMemory, CryptUnprotectMemory, CRYPTPROTECTMEMORY_BLOCK_SIZE,
|
||||
CRYPTPROTECTMEMORY_SAME_PROCESS,
|
||||
};
|
||||
|
||||
/// https://learn.microsoft.com/en-us/windows/win32/api/dpapi/nf-dpapi-cryptprotectdata
|
||||
/// The DPAPI store encrypts data using the Windows Data Protection API (DPAPI). The key is bound
|
||||
/// to the current process, and cannot be decrypted by other user-mode processes.
|
||||
///
|
||||
/// Note: Admin processes can still decrypt this memory:
|
||||
/// https://blog.slowerzs.net/posts/cryptdecryptmemory/
|
||||
pub(super) struct DpapiSecureKeyContainer {
|
||||
dpapi_encrypted_key: [u8; KEY_SIZE + CRYPTPROTECTMEMORY_BLOCK_SIZE as usize],
|
||||
}
|
||||
|
||||
// SAFETY: The encrypted data is fully owned by this struct, and not exposed outside or cloned,
|
||||
// and is disposed on drop of this struct.
|
||||
unsafe impl Send for DpapiSecureKeyContainer {}
|
||||
// SAFETY: The container is non-mutable and thus safe to share between threads.
|
||||
unsafe impl Sync for DpapiSecureKeyContainer {}
|
||||
|
||||
impl SecureKeyContainer for DpapiSecureKeyContainer {
|
||||
fn as_key(&self) -> MemoryEncryptionKey {
|
||||
let mut decrypted_key = self.dpapi_encrypted_key;
|
||||
unsafe {
|
||||
CryptUnprotectMemory(
|
||||
decrypted_key.as_mut_ptr() as *mut core::ffi::c_void,
|
||||
decrypted_key.len() as u32,
|
||||
CRYPTPROTECTMEMORY_SAME_PROCESS,
|
||||
)
|
||||
}
|
||||
.expect("crypt_unprotect_memory should work");
|
||||
let mut key = [0u8; KEY_SIZE];
|
||||
key.copy_from_slice(&decrypted_key[..KEY_SIZE]);
|
||||
MemoryEncryptionKey::from(&key)
|
||||
}
|
||||
|
||||
fn from_key(key: MemoryEncryptionKey) -> Self {
|
||||
let mut padded_key = [0u8; KEY_SIZE + CRYPTPROTECTMEMORY_BLOCK_SIZE as usize];
|
||||
padded_key[..KEY_SIZE].copy_from_slice(key.as_ref());
|
||||
unsafe {
|
||||
CryptProtectMemory(
|
||||
padded_key.as_mut_ptr() as *mut core::ffi::c_void,
|
||||
padded_key.len() as u32,
|
||||
CRYPTPROTECTMEMORY_SAME_PROCESS,
|
||||
)
|
||||
}
|
||||
.expect("crypt_protect_memory should work");
|
||||
DpapiSecureKeyContainer {
|
||||
dpapi_encrypted_key: padded_key,
|
||||
}
|
||||
}
|
||||
|
||||
fn is_supported() -> bool {
|
||||
// DPAPI is supported on all Windows versions that we support.
|
||||
true
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
|
||||
#[test]
|
||||
fn test_multiple_keys() {
|
||||
let key1 = MemoryEncryptionKey::new();
|
||||
let key2 = MemoryEncryptionKey::new();
|
||||
let container1 = DpapiSecureKeyContainer::from_key(key1);
|
||||
let container2 = DpapiSecureKeyContainer::from_key(key2);
|
||||
|
||||
// Capture at time 1
|
||||
let data_1_1 = container1.as_key();
|
||||
let data_2_1 = container2.as_key();
|
||||
// Capture at time 2
|
||||
let data_1_2 = container1.as_key();
|
||||
let data_2_2 = container2.as_key();
|
||||
|
||||
// Same keys should be equal
|
||||
assert_eq!(data_1_1.as_ref(), data_1_2.as_ref());
|
||||
assert_eq!(data_2_1.as_ref(), data_2_2.as_ref());
|
||||
|
||||
// Different keys should be different
|
||||
assert_ne!(data_1_1.as_ref(), data_2_1.as_ref());
|
||||
assert_ne!(data_1_2.as_ref(), data_2_2.as_ref());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_is_supported() {
|
||||
assert!(DpapiSecureKeyContainer::is_supported());
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,100 @@
|
||||
use crate::secure_memory::secure_key::crypto::MemoryEncryptionKey;
|
||||
|
||||
use super::crypto::KEY_SIZE;
|
||||
use super::SecureKeyContainer;
|
||||
use linux_keyutils::{KeyRing, KeyRingIdentifier};
|
||||
|
||||
/// The keys are bound to the process keyring.
|
||||
const KEY_RING_IDENTIFIER: KeyRingIdentifier = KeyRingIdentifier::Process;
|
||||
/// This is an atomic global counter used to help generate unique key IDs
|
||||
static COUNTER: std::sync::atomic::AtomicU64 = std::sync::atomic::AtomicU64::new(0);
|
||||
/// Generates a unique ID for the key in the kernel keyring.
|
||||
/// SAFETY: This function is safe to call from multiple threads because it uses an atomic counter.
|
||||
fn make_id() -> String {
|
||||
let counter = COUNTER.fetch_add(1, std::sync::atomic::Ordering::Relaxed);
|
||||
// In case multiple processes are running, include the PID in the key ID.
|
||||
let pid = std::process::id();
|
||||
format!("bitwarden_desktop_{}_{}", pid, counter)
|
||||
}
|
||||
|
||||
/// A secure key container that uses the Linux kernel keyctl API to store the key.
|
||||
/// `https://man7.org/linux/man-pages/man1/keyctl.1.html`. The kernel enforces only
|
||||
/// the correct process can read them, and they do not live in process memory space
|
||||
/// and cannot be dumped.
|
||||
pub(super) struct KeyctlSecureKeyContainer {
|
||||
/// The kernel has an identifier for the key. This is randomly generated on construction.
|
||||
id: String,
|
||||
}
|
||||
|
||||
// SAFETY: The key id is fully owned by this struct and not exposed or cloned, and cleaned up on drop.
|
||||
// Further, since we use `KeyRingIdentifier::Process` and not `KeyRingIdentifier::Thread`, the key
|
||||
// is accessible across threads within the same process bound.
|
||||
unsafe impl Send for KeyctlSecureKeyContainer {}
|
||||
// SAFETY: The container is non-mutable and thus safe to share between threads.
|
||||
unsafe impl Sync for KeyctlSecureKeyContainer {}
|
||||
|
||||
impl SecureKeyContainer for KeyctlSecureKeyContainer {
|
||||
fn as_key(&self) -> MemoryEncryptionKey {
|
||||
let ring = KeyRing::from_special_id(KEY_RING_IDENTIFIER, false)
|
||||
.expect("should get process keyring");
|
||||
let key = ring.search(&self.id).expect("should find key");
|
||||
let mut buffer = [0u8; KEY_SIZE];
|
||||
key.read(&mut buffer).expect("should read key");
|
||||
MemoryEncryptionKey::from(&buffer)
|
||||
}
|
||||
|
||||
fn from_key(data: MemoryEncryptionKey) -> Self {
|
||||
let ring = KeyRing::from_special_id(KEY_RING_IDENTIFIER, true)
|
||||
.expect("should get process keyring");
|
||||
let id = make_id();
|
||||
ring.add_key(&id, &data).expect("should add key");
|
||||
KeyctlSecureKeyContainer { id }
|
||||
}
|
||||
|
||||
fn is_supported() -> bool {
|
||||
KeyRing::from_special_id(KEY_RING_IDENTIFIER, true).is_ok()
|
||||
}
|
||||
}
|
||||
|
||||
impl Drop for KeyctlSecureKeyContainer {
|
||||
fn drop(&mut self) {
|
||||
let ring = KeyRing::from_special_id(KEY_RING_IDENTIFIER, false)
|
||||
.expect("should get process keyring");
|
||||
if let Ok(key) = ring.search(&self.id) {
|
||||
let _ = key.invalidate();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
|
||||
#[test]
|
||||
fn test_multiple_keys() {
|
||||
let key1 = MemoryEncryptionKey::new();
|
||||
let key2 = MemoryEncryptionKey::new();
|
||||
let container1 = KeyctlSecureKeyContainer::from_key(key1);
|
||||
let container2 = KeyctlSecureKeyContainer::from_key(key2);
|
||||
|
||||
// Capture at time 1
|
||||
let data_1_1 = container1.as_key();
|
||||
let data_2_1 = container2.as_key();
|
||||
// Capture at time 2
|
||||
let data_1_2 = container1.as_key();
|
||||
let data_2_2 = container2.as_key();
|
||||
|
||||
// Same keys should be equal
|
||||
assert_eq!(data_1_1.as_ref(), data_1_2.as_ref());
|
||||
assert_eq!(data_2_1.as_ref(), data_2_2.as_ref());
|
||||
|
||||
// Different keys should be different
|
||||
assert_ne!(data_1_1.as_ref(), data_2_1.as_ref());
|
||||
assert_ne!(data_1_2.as_ref(), data_2_2.as_ref());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_is_supported() {
|
||||
assert!(KeyctlSecureKeyContainer::is_supported());
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,109 @@
|
||||
use std::{ptr::NonNull, sync::LazyLock};
|
||||
|
||||
use super::crypto::MemoryEncryptionKey;
|
||||
use super::crypto::KEY_SIZE;
|
||||
use super::SecureKeyContainer;
|
||||
|
||||
/// https://man.archlinux.org/man/memfd_secret.2.en
|
||||
/// The memfd_secret store protects the data using the `memfd_secret` syscall. The
|
||||
/// data is inaccessible to other user-mode processes, and even to root in most cases.
|
||||
/// If arbitrary data can be executed in the kernel, the data can still be retrieved:
|
||||
/// https://github.com/JonathonReinhart/nosecmem
|
||||
pub(super) struct MemfdSecretSecureKeyContainer {
|
||||
ptr: NonNull<[u8]>,
|
||||
}
|
||||
// SAFETY: The pointers in this struct are allocated by `memfd_secret`, and we have full ownership.
|
||||
// They are never exposed outside or cloned, and are cleaned up by drop.
|
||||
unsafe impl Send for MemfdSecretSecureKeyContainer {}
|
||||
// SAFETY: The container is non-mutable and thus safe to share between threads. Further, memfd-secret
|
||||
// is accessible across threads within the same process bound.
|
||||
unsafe impl Sync for MemfdSecretSecureKeyContainer {}
|
||||
|
||||
impl SecureKeyContainer for MemfdSecretSecureKeyContainer {
|
||||
fn as_key(&self) -> MemoryEncryptionKey {
|
||||
MemoryEncryptionKey::from(
|
||||
&unsafe { self.ptr.as_ref() }
|
||||
.try_into()
|
||||
.expect("slice should be KEY_SIZE"),
|
||||
)
|
||||
}
|
||||
|
||||
fn from_key(key: MemoryEncryptionKey) -> Self {
|
||||
let mut ptr: NonNull<[u8]> = unsafe {
|
||||
memsec::memfd_secret_sized(KEY_SIZE).expect("memfd_secret_sized should work")
|
||||
};
|
||||
unsafe {
|
||||
std::ptr::copy_nonoverlapping(
|
||||
key.as_ref().as_ptr(),
|
||||
ptr.as_mut().as_mut_ptr(),
|
||||
KEY_SIZE,
|
||||
);
|
||||
}
|
||||
MemfdSecretSecureKeyContainer { ptr }
|
||||
}
|
||||
|
||||
/// Note, `memfd_secret` is only available since Linux 6.5, so fallbacks are needed.
|
||||
fn is_supported() -> bool {
|
||||
// To test if memfd_secret is supported, we try to allocate a 1 byte and see if that
|
||||
// succeeds.
|
||||
static IS_SUPPORTED: LazyLock<bool> = LazyLock::new(|| {
|
||||
let Some(ptr): Option<NonNull<[u8]>> = (unsafe { memsec::memfd_secret_sized(1) })
|
||||
else {
|
||||
return false;
|
||||
};
|
||||
|
||||
// Check that the pointer is readable and writable
|
||||
let result = unsafe {
|
||||
let ptr = ptr.as_ptr() as *mut u8;
|
||||
*ptr = 30;
|
||||
*ptr += 107;
|
||||
*ptr == 137
|
||||
};
|
||||
|
||||
unsafe { memsec::free_memfd_secret(ptr) };
|
||||
result
|
||||
});
|
||||
*IS_SUPPORTED
|
||||
}
|
||||
}
|
||||
|
||||
impl Drop for MemfdSecretSecureKeyContainer {
|
||||
fn drop(&mut self) {
|
||||
unsafe {
|
||||
memsec::free_memfd_secret(self.ptr);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
|
||||
#[test]
|
||||
fn test_multiple_keys() {
|
||||
let key1 = MemoryEncryptionKey::new();
|
||||
let key2 = MemoryEncryptionKey::new();
|
||||
let container1 = MemfdSecretSecureKeyContainer::from_key(key1);
|
||||
let container2 = MemfdSecretSecureKeyContainer::from_key(key2);
|
||||
|
||||
// Capture at time 1
|
||||
let data_1_1 = container1.as_key();
|
||||
let data_2_1 = container2.as_key();
|
||||
// Capture at time 2
|
||||
let data_1_2 = container1.as_key();
|
||||
let data_2_2 = container2.as_key();
|
||||
|
||||
// Same keys should be equal
|
||||
assert_eq!(data_1_1.as_ref(), data_1_2.as_ref());
|
||||
assert_eq!(data_2_1.as_ref(), data_2_2.as_ref());
|
||||
|
||||
// Different keys should be different
|
||||
assert_ne!(data_1_1.as_ref(), data_2_1.as_ref());
|
||||
assert_ne!(data_1_2.as_ref(), data_2_2.as_ref());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_is_supported() {
|
||||
assert!(MemfdSecretSecureKeyContainer::is_supported());
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,83 @@
|
||||
use std::ptr::NonNull;
|
||||
|
||||
use super::crypto::MemoryEncryptionKey;
|
||||
use super::crypto::KEY_SIZE;
|
||||
use super::SecureKeyContainer;
|
||||
|
||||
/// A SecureKeyContainer that uses mlock to prevent the memory from being swapped to disk.
|
||||
/// This does not provide as strong protections as other methods, but is always supported.
|
||||
pub(super) struct MlockSecureKeyContainer {
|
||||
ptr: NonNull<[u8]>,
|
||||
}
|
||||
// SAFETY: The pointers in this struct are allocated by `malloc_sized`, and we have full ownership.
|
||||
// They are never exposed outside or cloned, and are cleaned up by drop.
|
||||
unsafe impl Send for MlockSecureKeyContainer {}
|
||||
// SAFETY: The container is non-mutable and thus safe to share between threads.
|
||||
unsafe impl Sync for MlockSecureKeyContainer {}
|
||||
|
||||
impl SecureKeyContainer for MlockSecureKeyContainer {
|
||||
fn as_key(&self) -> MemoryEncryptionKey {
|
||||
MemoryEncryptionKey::from(
|
||||
&unsafe { self.ptr.as_ref() }
|
||||
.try_into()
|
||||
.expect("slice should be KEY_SIZE"),
|
||||
)
|
||||
}
|
||||
fn from_key(key: MemoryEncryptionKey) -> Self {
|
||||
let mut ptr: NonNull<[u8]> =
|
||||
unsafe { memsec::malloc_sized(KEY_SIZE).expect("malloc_sized should work") };
|
||||
unsafe {
|
||||
std::ptr::copy_nonoverlapping(
|
||||
key.as_ref().as_ptr(),
|
||||
ptr.as_mut().as_mut_ptr(),
|
||||
KEY_SIZE,
|
||||
);
|
||||
}
|
||||
MlockSecureKeyContainer { ptr }
|
||||
}
|
||||
|
||||
fn is_supported() -> bool {
|
||||
true
|
||||
}
|
||||
}
|
||||
|
||||
impl Drop for MlockSecureKeyContainer {
|
||||
fn drop(&mut self) {
|
||||
unsafe {
|
||||
memsec::free(self.ptr);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
|
||||
#[test]
|
||||
fn test_multiple_keys() {
|
||||
let key1 = MemoryEncryptionKey::new();
|
||||
let key2 = MemoryEncryptionKey::new();
|
||||
let container1 = MlockSecureKeyContainer::from_key(key1);
|
||||
let container2 = MlockSecureKeyContainer::from_key(key2);
|
||||
|
||||
// Capture at time 1
|
||||
let data_1_1 = container1.as_key();
|
||||
let data_2_1 = container2.as_key();
|
||||
// Capture at time 2
|
||||
let data_1_2 = container1.as_key();
|
||||
let data_2_2 = container2.as_key();
|
||||
|
||||
// Same keys should be equal
|
||||
assert_eq!(data_1_1.as_ref(), data_1_2.as_ref());
|
||||
assert_eq!(data_2_1.as_ref(), data_2_2.as_ref());
|
||||
|
||||
// Different keys should be different
|
||||
assert_ne!(data_1_1.as_ref(), data_2_1.as_ref());
|
||||
assert_ne!(data_1_2.as_ref(), data_2_2.as_ref());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_is_supported() {
|
||||
assert!(MlockSecureKeyContainer::is_supported());
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,242 @@
|
||||
//! This module provides hardened storage for single cryptographic keys. These are meant for encrypting large amounts of memory.
|
||||
//! Some platforms restrict how many keys can be protected by their APIs, which necessitates this layer of indirection. This significantly
|
||||
//! reduces the complexity of each platform specific implementation, since all that's needed is implementing protecting a single fixed sized key
|
||||
//! instead of protecting many arbitrarily sized secrets. This significantly lowers the effort to maintain each implementation.
|
||||
//!
|
||||
//! The implementations include DPAPI on Windows, `keyctl` on Linux, and `memfd_secret` on Linux, and a fallback implementation using mlock.
|
||||
|
||||
use tracing::info;
|
||||
|
||||
mod crypto;
|
||||
#[cfg(target_os = "windows")]
|
||||
mod dpapi;
|
||||
#[cfg(target_os = "linux")]
|
||||
mod keyctl;
|
||||
#[cfg(target_os = "linux")]
|
||||
mod memfd_secret;
|
||||
mod mlock;
|
||||
|
||||
pub use crypto::EncryptedMemory;
|
||||
|
||||
use crate::secure_memory::secure_key::crypto::DecryptionError;
|
||||
|
||||
/// An ephemeral key that is protected using a platform mechanism. It is generated on construction freshly, and can be used
|
||||
/// to encrypt and decrypt segments of memory. Since the key is ephemeral, persistent data cannot be encrypted with this key.
|
||||
/// On Linux and Windows, in most cases the protection mechanisms prevent memory dumps/debuggers from reading the key.
|
||||
///
|
||||
/// Note: This can be circumvented if code can be injected into the process and is only effective in combination with the
|
||||
/// memory isolation provided in `process_isolation`.
|
||||
/// - https://github.com/zer1t0/keydump
|
||||
#[allow(unused)]
|
||||
pub(crate) struct SecureMemoryEncryptionKey(CrossPlatformSecureKeyContainer);
|
||||
|
||||
impl SecureMemoryEncryptionKey {
|
||||
pub fn new() -> Self {
|
||||
SecureMemoryEncryptionKey(CrossPlatformSecureKeyContainer::from_key(
|
||||
crypto::MemoryEncryptionKey::new(),
|
||||
))
|
||||
}
|
||||
|
||||
/// Encrypts the provided plaintext using the contained key, returning an EncryptedMemory blob.
|
||||
#[allow(unused)]
|
||||
pub fn encrypt(&self, plaintext: &[u8]) -> crypto::EncryptedMemory {
|
||||
self.0.as_key().encrypt(plaintext)
|
||||
}
|
||||
|
||||
/// Decrypts the provided EncryptedMemory blob using the contained key, returning the plaintext.
|
||||
/// If the decryption fails, that means the memory was tampered with, and the function panics.
|
||||
#[allow(unused)]
|
||||
pub fn decrypt(&self, encrypted: &crypto::EncryptedMemory) -> Result<Vec<u8>, DecryptionError> {
|
||||
self.0.as_key().decrypt(encrypted)
|
||||
}
|
||||
}
|
||||
|
||||
/// A platform specific implementation of a key container that protects a single encryption key
|
||||
/// from memory attacks.
|
||||
#[allow(unused)]
|
||||
trait SecureKeyContainer: Sync + Send {
|
||||
/// Returns the key as a byte slice. This slice does not have additional memory protections applied.
|
||||
fn as_key(&self) -> crypto::MemoryEncryptionKey;
|
||||
/// Creates a new SecureKeyContainer from the provided key.
|
||||
fn from_key(key: crypto::MemoryEncryptionKey) -> Self;
|
||||
/// Returns true if this platform supports this secure key container implementation.
|
||||
fn is_supported() -> bool;
|
||||
}
|
||||
|
||||
#[allow(unused)]
|
||||
enum CrossPlatformSecureKeyContainer {
|
||||
#[cfg(target_os = "windows")]
|
||||
Dpapi(dpapi::DpapiSecureKeyContainer),
|
||||
#[cfg(target_os = "linux")]
|
||||
Keyctl(keyctl::KeyctlSecureKeyContainer),
|
||||
#[cfg(target_os = "linux")]
|
||||
MemfdSecret(memfd_secret::MemfdSecretSecureKeyContainer),
|
||||
Mlock(mlock::MlockSecureKeyContainer),
|
||||
}
|
||||
|
||||
impl SecureKeyContainer for CrossPlatformSecureKeyContainer {
|
||||
fn as_key(&self) -> crypto::MemoryEncryptionKey {
|
||||
match self {
|
||||
#[cfg(target_os = "windows")]
|
||||
CrossPlatformSecureKeyContainer::Dpapi(c) => c.as_key(),
|
||||
#[cfg(target_os = "linux")]
|
||||
CrossPlatformSecureKeyContainer::Keyctl(c) => c.as_key(),
|
||||
#[cfg(target_os = "linux")]
|
||||
CrossPlatformSecureKeyContainer::MemfdSecret(c) => c.as_key(),
|
||||
CrossPlatformSecureKeyContainer::Mlock(c) => c.as_key(),
|
||||
}
|
||||
}
|
||||
|
||||
fn from_key(key: crypto::MemoryEncryptionKey) -> Self {
|
||||
if let Some(container) = get_env_forced_container() {
|
||||
return container;
|
||||
}
|
||||
|
||||
#[cfg(target_os = "windows")]
|
||||
{
|
||||
if dpapi::DpapiSecureKeyContainer::is_supported() {
|
||||
info!("Using DPAPI for secure key storage");
|
||||
return CrossPlatformSecureKeyContainer::Dpapi(
|
||||
dpapi::DpapiSecureKeyContainer::from_key(key),
|
||||
);
|
||||
}
|
||||
}
|
||||
#[cfg(target_os = "linux")]
|
||||
{
|
||||
// Memfd_secret is slightly better in some cases of the kernel being compromised.
|
||||
// Note that keyctl may sometimes not be available in e.g. snap. Memfd_secret is
|
||||
// not available on kernels older than 6.5 while keyctl is supported since 2.6.
|
||||
//
|
||||
// Note: This may prevent the system from hibernating but not sleeping. Hibernate
|
||||
// would write the memory to disk, exposing the keys. If this is an issue,
|
||||
// the environment variable `SECURE_KEY_CONTAINER_BACKEND` can be used
|
||||
// to force the use of keyctl or mlock.
|
||||
if memfd_secret::MemfdSecretSecureKeyContainer::is_supported() {
|
||||
info!("Using memfd_secret for secure key storage");
|
||||
return CrossPlatformSecureKeyContainer::MemfdSecret(
|
||||
memfd_secret::MemfdSecretSecureKeyContainer::from_key(key),
|
||||
);
|
||||
}
|
||||
if keyctl::KeyctlSecureKeyContainer::is_supported() {
|
||||
info!("Using keyctl for secure key storage");
|
||||
return CrossPlatformSecureKeyContainer::Keyctl(
|
||||
keyctl::KeyctlSecureKeyContainer::from_key(key),
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
// Falling back to mlock means that the key is accessible via memory dumping.
|
||||
info!("Falling back to mlock for secure key storage");
|
||||
CrossPlatformSecureKeyContainer::Mlock(mlock::MlockSecureKeyContainer::from_key(key))
|
||||
}
|
||||
|
||||
fn is_supported() -> bool {
|
||||
// Mlock is always supported as a fallback.
|
||||
true
|
||||
}
|
||||
}
|
||||
|
||||
fn get_env_forced_container() -> Option<CrossPlatformSecureKeyContainer> {
|
||||
let env_var = std::env::var("SECURE_KEY_CONTAINER_BACKEND");
|
||||
match env_var.as_deref() {
|
||||
#[cfg(target_os = "windows")]
|
||||
Ok("dpapi") => {
|
||||
info!("Forcing DPAPI secure key container via environment variable");
|
||||
Some(CrossPlatformSecureKeyContainer::Dpapi(
|
||||
dpapi::DpapiSecureKeyContainer::from_key(crypto::MemoryEncryptionKey::new()),
|
||||
))
|
||||
}
|
||||
#[cfg(target_os = "linux")]
|
||||
Ok("memfd_secret") => {
|
||||
info!("Forcing memfd_secret secure key container via environment variable");
|
||||
Some(CrossPlatformSecureKeyContainer::MemfdSecret(
|
||||
memfd_secret::MemfdSecretSecureKeyContainer::from_key(
|
||||
crypto::MemoryEncryptionKey::new(),
|
||||
),
|
||||
))
|
||||
}
|
||||
#[cfg(target_os = "linux")]
|
||||
Ok("keyctl") => {
|
||||
info!("Forcing keyctl secure key container via environment variable");
|
||||
Some(CrossPlatformSecureKeyContainer::Keyctl(
|
||||
keyctl::KeyctlSecureKeyContainer::from_key(crypto::MemoryEncryptionKey::new()),
|
||||
))
|
||||
}
|
||||
Ok("mlock") => {
|
||||
info!("Forcing mlock secure key container via environment variable");
|
||||
Some(CrossPlatformSecureKeyContainer::Mlock(
|
||||
mlock::MlockSecureKeyContainer::from_key(crypto::MemoryEncryptionKey::new()),
|
||||
))
|
||||
}
|
||||
_ => {
|
||||
info!(
|
||||
"{} is not a valid secure key container backend, using automatic selection",
|
||||
env_var.unwrap_or_default()
|
||||
);
|
||||
None
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
|
||||
#[test]
|
||||
fn test_multiple_keys() {
|
||||
// Create 20 different keys
|
||||
let original_keys: Vec<crypto::MemoryEncryptionKey> = (0..20)
|
||||
.map(|_| crypto::MemoryEncryptionKey::new())
|
||||
.collect();
|
||||
|
||||
// Store them in secure containers
|
||||
let containers: Vec<CrossPlatformSecureKeyContainer> = original_keys
|
||||
.iter()
|
||||
.map(|key| {
|
||||
let key_bytes: &[u8; crypto::KEY_SIZE] = key.as_ref().try_into().unwrap();
|
||||
CrossPlatformSecureKeyContainer::from_key(crypto::MemoryEncryptionKey::from(
|
||||
key_bytes,
|
||||
))
|
||||
})
|
||||
.collect();
|
||||
|
||||
// Read all keys back and validate they match the originals
|
||||
for (i, (original_key, container)) in
|
||||
original_keys.iter().zip(containers.iter()).enumerate()
|
||||
{
|
||||
let retrieved_key = container.as_key();
|
||||
assert_eq!(
|
||||
original_key.as_ref(),
|
||||
retrieved_key.as_ref(),
|
||||
"Key {} should match after storage and retrieval",
|
||||
i
|
||||
);
|
||||
}
|
||||
|
||||
// Verify all keys are different from each other
|
||||
for i in 0..original_keys.len() {
|
||||
for j in (i + 1)..original_keys.len() {
|
||||
assert_ne!(
|
||||
original_keys[i].as_ref(),
|
||||
original_keys[j].as_ref(),
|
||||
"Keys {} and {} should be different",
|
||||
i,
|
||||
j
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
// Read keys back a second time to ensure consistency
|
||||
for (i, (original_key, container)) in
|
||||
original_keys.iter().zip(containers.iter()).enumerate()
|
||||
{
|
||||
let retrieved_key_again = container.as_key();
|
||||
assert_eq!(
|
||||
original_key.as_ref(),
|
||||
retrieved_key_again.as_ref(),
|
||||
"Key {} should still match on second retrieval",
|
||||
i
|
||||
);
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user